SU565776A1 - Apparatus for electric discharge-sintering of powders - Google Patents

Description

one

The invention relates to powder metallurgy, in particular, to devices for the manufacture of long products by electric discharge sintering of powders.

A device for sintering powders by direct current passing is known, consisting of a matrix, punches and tokopodvod, and in the matrix there are conductive plates connected to the current leads and secured by means of help; MTOB.

Such a device does not allow for the electric discharge sintering of powders in connection with the possibility of the flow of pulsed current directly through the plates, and not through the sintered powder.

The closest technical solution to the invention is an electric discharge sintering of powders, including a composite matrix with a working cavity, punches and current leads. Inserts made of electrically insulating material are installed in the cavity of the matrix, and the punches are made of electrically conductive material and are connected with current leads.

The disadvantages of this device include the complexity of the design and the poor quality of long products made of metal powders.

In order to simplify the design and quality of long products, the composite matrix of the proposed device is equipped with L-shaped clips and inserts located inside the clips, the clips being made of electrically conductive material, electrically insulated from one another and connected to current / leads, and inserts and punches made of electrically insulating material.

In this case, the inserts and punches form the elements of the working cavity with the maximum linear dimensions, and the clips - the elements with the minimum linr sizes.

FIG. Figure 1 shows schematically the proposed device for electroporma sintering powder sintering. A front view with a partial section; nafig.2 same view.

Claims (2)

The device includes a cocTnnnyii matrix consisting of inserts 1 and 2, sh. Puls of electrically insulated zioigcl ml g (: P | -1Lv, L-shaped clips 3 and 4 of electrically conductive material and cheeks 5 and 6 equipped with a clip 7. V cavities formed by inserts and holders, the upper 8 and lower 9 punches are made of electrically insulating material, and between them are placed the powder billet JO. Chocpod - 11 and 12 are connected to bites along the cheeks, which are isolated from one another by an electrically insulating plate 13, and from the process (not shown in the drawings) electroisol Ion plate 14. The device operates as follows: Electric current from a pulsed source (not shown in the drawings) is passed through electrically conductive inserts and a powder drip between them. The resulting electrical discharge between particles causes a break, and the current will flow. walks in the direction of the maximum size of the billet, and loading of the workpiece through the punches is carried out in the direction of the minimum size of the workpiece. The application of the described device allows us to simplify the technological equipment used and to improve the quality of, in particular, the day-baked product. 1. Device for electric sintering, powders, including a composite metal working cavity, punches and current leads, characterized in that, in order to simplify the design of the device and improve the quality of long products, the composite matrix is equipped with L-shaped holders and inserts , located-. Inside the clips, the clips are made of an electrically conductive material, electrically isolated from one another and connected to the current leads, and the inserts and punches are made of a icing material. 2. The device according to claim 1, that is, that the inserts and punches form. The elements of the working cavity with maximally 1 mm of linear dimensions, and the clips-elements with minimum linear dimensions. J FI.1 /